Beater-roll with ventilated knife-cells.



No. 222.229. PATENTED AUG. 21, 1906. 2

' F. PIESSLINGER.

BEATBR ROLL WITH VENTILATED KNIFE CELLS.

APPLICATION FILED JULY'I. 1905.

UNITED STATES PATENT OFFICE.

FRIEDRICH PIESSLINGER, OF PHILADELPHIA, PENNSYLVANIA.

BEATER-HOLL WITH VENTILATED KNIFE-CELLS.

Specification of Letters Patent.

Patented Aug. 21, 1906.

Application filed July 7,1905. Serial No. 268,695.

4 del hia, in the county of Philadelphia, State of ennsylvania, haveinvented a new and useful Beater-Roll with Ventilated Knifc- Cells, ofwhich the following is a specification.

My invention relates to an improvementin beater-rolls, which can beapplied to all rolls, as used in any system of beater, to beat or to cutpaper-stock, material for making paper, or boards or pap-likesubstances; and the object of my improvement is to construct thebeater-rolls in such a manner that the air filling the knife-cells(spaces between the knives) can leave each knife-cell not only on thetwo ends or shoulders of the roll, but on one or more oints between theends or shoulders of t e roll, when the knife-cells plane into theliquid or pap-like stock.

A ther object of my invention is to so construct a beater-roll that itis provided with short knife-cells, each one of said knifecellsextending over only a part of the entire length of the roll, so thatwhen the knife-cells plunge into the pulp the air being expelled y thepulp can escape on both ends of the short knife-cells.

Further objects and advantages of the inventiomwill hereinafter appearand the novel features thereof will be specifically defined by theappended claims.

The invention is clearl-yillustrated in the accompanying drawings,which, with the numerals of reference marked thereon, form a part ofthis specification, and in which Figure 1 re resents a front elevationof a beater-roll em odying my invention. Fig. 2 represents a sectionaleevation of another embodiment which may be employed.

In both the embodiments shown the knives may be set parallel or in anyangle to the axis of the roll or may be formed in any line, as they arealready formed in serpentine or other lines.

Similar numerals of reference indicate corres onding parts in thefigures.

Iiieferring to the drawings, 1 designates the roll-axis, having mountedthereon sectional roll-bodies 2 in any suitable manner.

3 designates knife-blades, which in Fig. 1 are shown as extending to theedge of the body-sections.

In the embodiment shown in Fig. 2, 4 designatcs the shaft on which thesectional rollbodies 5 are mounted, said sections 5 having kn ivcs 6secured thereon by means of shrunk rings 7 engaging the apertures orslots 8 at the ends of said knives, it being noted that,

the ends of the knives in this instance terminate at a point within theends of their bodysections, In use the axis of the beater-roll is alwaysabove the surface of the stock and the roll can be rotated with lesspower in roportion to the speed. The air asses rom the air-spacesbetween the bladhs through the passages formed between the sets ofblades, said sets being in alinement, angularl disposed, or instaggered. relation to eac 1 other. The direction of the airpassing fromthe blades is in every case substantially circumferential and not axial,as has heretofore been proposed. By reason of the hi h angle of theblades the beater-roll can not on y be actuated at a higher speed in proiortion to the power employed, but the s )eed of circulation of thestock is incrcaser As the air does not hinder the liquid or stock fromfilling the cells, the cells can be made much smaller thauon abeater-roll as heretofore constructed, and a roll embodying theimprovements herein described and having the same diameter as oneconstructed according to the ordinary type will do .the same beatingwith a much lower speed and also save power,

since there are more knives on the roll-body. The stock circulates muchquicker, and time will therefore be saved in beating the same quantityof stock, as is evident. Better circulation of the stock will also beobtained by a quicker and more exact discharge of the ventilatedknife-cells. It will be apparent that while in Fig. 2 the knives havebeen shown in alinenient, whether these knives are in or out ofalinemcnt depends entirely uponthc manner in which the sectional bodiesare assembled.

\Vhat I claim as my invention, and desire to secure b Letters Patent,is-

1. In a )eatcr-roll, a sectional roll-body, knives carried by eachsection and arranged out of alineinent when said sections are inassembled position roviding air-passages for slots for retaining saidknives in fixed relation :0 the circumferential escape of air at one orto said body. more points between the adjacent ends of the In testimonywhereof I affix my signature knives. b n l n b d in presence of twowitnesses.

2. In a eater-r0 a sect-iona r0 o y, knives having a slot at each endcarried by FRIEDRICH PIESSLINGER' each section, the inner end of eachknife ter- Witnesses: minating at a point within the end of their F. H.I'IENING, body-section, and shrunk rings seated in said J. C. SCHMIDT.

